Final answer:
The question pertains to elements in the periodic table, focusing on transactinide elements such as Darmstadtium (Ds). It is likely a Chemistry subject query related to naming elements and their positioning in the periodic table.
Step-by-step explanation:
The information provided seems to refer to the periodic table of elements, specifically to the transactinide elements (elements with atomic numbers 104–118). The letters like "Ds" mentioned in the question correspond to the symbols of these elements: Darmstadtium (Ds) with atomic number 110, for instance.
These elements are in the 7th period of the periodic table. The question may be related to the concept of naming chemical elements and understanding their place in the periodic table.